Lawnmower engines are usually 4-stroke, although 2-stroke engines are available. A 4-stroke engine has a crankcase located at the lowest point of the engine. The oil in this tank is thrown on the walls of the cylinder, the crankshaft and all other moving parts with a dashboard or "flicker". The oil level in an engine must be checked before use. If the level is too low or there is no oil in the motor, it will seize quickly.
- Make sure the engine is cold or wait 5 minutes for the oil to stabilize if the engine has been running.
- Place mower on a level surface.
- Remove the dipstick: it is usually attached to a small screw cap, smaller than the fuel tank.
- Clean the rod with a cloth. Consider the high and low level marks.
- Replace the measuring rod.
- Now remove the dipstick again and check that the level is between the marks.
Acquire the habit of checking the oil level regularly. Ideally, this should be done every time you use the lawnmower, but if the engine is not burning oil, one control is sufficient each month (depending on use). If cutting in sloping terrain, oil consumption may be higher if oil is expelled through a vent/deflector arrangement for the crankcase called a vent. In fact, it is not harmful to keep the carburetor on the high side when working on a slope.
Lawn mowers should have an oil change after every 20 to 50 hours of use (see your manual or search engine block for more information). If you do not know how to do this, refer to my guide how to change mower oil.
If you buy a new lawnmower or engine, the oil sump will usually be empty. The manufacturers drain the oil after the test and before shipment so that it does not leak if the boxes/boxes are turned upside down. Do not forget to add oil before use! Usually there is a label to remind you to do this before you begin.